These 4.5" street compliant high-flow mufflers have been specifically tuned to deliver an aggressive exhaust note and improved performance. The straight-through perforated baffle reduces airflow restriction, and produces a rich exhaust note throughout the entire RPM range. You get a great performance, a powerful base rumble and a throaty tone while on the throttle, while maintaining a mellow note while cruising. Satin Black Finish. Matching or contrasting end caps (sold separately) complete the custom look. 50 state U.S. EPA compliant. Sold in Pairs. Material Content: Steel. 1 year limited warranty. Fits '18-later FXFB and FXFBS models. Installation requires separate purchase of Muffler End Caps P/N 65100122 or 65100123 (Qty 2). All models require ECM calibration with Screamin’ Eagle® Pro Street Tuner (sold separately). 50 state U.S. EPA Compliant.